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getSignedDistanceField

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Azgaar 2021-03-14 14:32:21 +03:00
parent 845f2e99f5
commit 00189f2185
4 changed files with 60 additions and 52 deletions
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16
modules/ocean-layers.js
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@ -14,7 +14,6 @@
lineGen.curve(d3.curveBasisClosed);
cells = grid.cells, pointsN = grid.cells.i.length, vertices = grid.vertices;
const limits = outline === "random" ? randomizeOutline() : outline.split(",").map(s => +s);
markupOcean(limits);
const chains = [];
const opacity = rn(0.4 / limits.length, 2);
@ -33,15 +32,12 @@
const relaxed = chain.filter((v, i) => !(i%relax) || vertices.c[v].some(c => c >= pointsN));
if (relaxed.length < 4) continue;
const points = clipPoly(relaxed.map(v => vertices.p[v]), 1);
//const inside = d3.polygonContains(points, grid.points[i]);
chains.push([t, points]); //chains.push([t, points, inside]);
chains.push([t, points]);
}
//const bbox = `M0,0h${graphWidth}v${graphHeight}h${-graphWidth}Z`;
for (const t of limits) {
const layer = chains.filter(c => c[0] === t);
let path = layer.map(c => round(lineGen(c[1]))).join("");
//if (layer.every(c => !c[2])) path = bbox + path; // add outer ring if all segments are outside (works not for all cases)
if (path) oceanLayers.append("path").attr("d", path).attr("fill", "#ecf2f9").style("opacity", opacity);
}
@ -64,16 +60,6 @@
return limits;
}
// Define grid ocean cells type based on distance form land
function markupOcean(limits) {
for (let t = -2; t >= limits[0]-1; t--) {
for (let i = 0; i < pointsN; i++) {
if (cells.t[i] !== t+1) continue;
cells.c[i].forEach(function(e) {if (!cells.t[e]) cells.t[e] = t;});
}
}
}
// connect vertices to chain
function connectVertices(start, t) {
const chain = []; // vertices chain to form a path